We use the verb Have to to express obligation. Have to
HAVE TO I have a presentation next week. I have to prepare it.
HAVE TO She has to take her medicine.
HAVE TO She has to go to the dentist.
HAVE TO Nurses have to wear a uniform at work.
HAVE TO You have to get tickets to go to the concert.
HAVE TO She has to change the flat tire.
HAVE TO Your interview is at 9:00. You don’t have to get up very early.
HAVE TO The wedding planner is in charge of everything. The bride doesn’t have to worry for anything.
THE END